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This is only a preview of the September 2011 issue of Silicon Chip. You can view 28 of the 104 pages in the full issue, including the advertisments. For full access, purchase the issue for $10.00 or subscribe for access to the latest issues. Items relevant to "Ultrasonic Water Tank Level Gauge":
Items relevant to "Improving The GPS-Based Frequency Reference":
Items relevant to "High-Performance Stereo Headphone Amplifier, Pt.1":
Items relevant to "Ultra-LD Mk.3 200W Amplifier Module, Pt.3":
Items relevant to "Upgrading An Ultra-LD Mk.2 Amplifier To Mk.3 Standard":
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Contents
SILICON
CHIP
www.siliconchip.com.au
Vol.24, No.9; September 2011
Features
14 LED Lighting Explained
High-power LED lighting has several special features which may not
immediately be apparent. We explain the secrets – by Ross Spina
22 Can You Really Reduce Your Electricity Bill?
You’ll see a lot in the popular press about ways to reduce your power bill but is
there really a “magic bullet”? – by John Cameron
LED Lighting Explained –
Page 14.
14.
28 World Record 111-Gigapixel Photograph
It took them nine months and 9750 individual frames to stitch together the
(then!) world record photo of Seville in Spain – by Ross Tester
80 The Electronex Show Is Coming To Melbourne
Following on from the success of the Sydney Show last year, Electronex in
Melbourne this month promises to be even bigger and better – by Ross Tester
Pro jects To Build
30 Ultrasonic Water Tank Level Gauge
This ultrasonic tank level gauge fires an energy burst which bounces off the
surface of the water to compute the depth – by John Clarke
40 Improving The GPS-Based Frequency Reference
A few simple circuit changes significantly improve its frequency stability and
make it easier to lock the oven crystal to the correct frequency – by Jim Rowe
62 High-Performance Stereo Headphone Amplifier, Pt.1
If you’re looking for a high-performance stereo headphone amplifier, then this
is the one to build – by Nicholas Vinen
Ultrasonic Water Tank Level
Gauge – Page 30.
72 Ultra-LD Mk.3 200W Amplifier Module, Pt.3
Third article shows you how to build the power supply and describes how to
test and adjust the completed amplifier – by Nicholas Vinen
84 Upgrading An Ultra-LD Mk.2 Amplifier To Mk.3 Standard
Want to upgrade your Ultra-LD Mk.2 amplifier to Mk.3 standard? We’ve
designed a teensy add-on PCB to make the job easy – by Nicholas Vinen
Special Columns
44 Serviceman’s Log
It’s very simple when you know how – by the Serviceman
57 Circuit Notebook
Stereo Headphone
Amplifier – Page 62.
(1) Automatic TOSlink Digital Audio Switcher (2) Temperature Meter Has °C
and °F Scales; (3) PICAXE Infrared Remote Switch For Decorative LED Light;
(4) Phantom Power For The USB Recording Interface; (5) “Postie” Annunciator
Indicates When You Have Mail
90 Vintage Radio
Improving the Hotpoint Bandmaster J35DE console radio – by Maurie Findlay
Departments
2 Publisher’s Letter
4 Mailbag
95 Order Form
siliconchip.com.au
98 Ask Silicon Chip
102 Coming Next Month
103 Market Centre
Ultra-LD Mk.3
Amplifier Pt.3: Power
Supply & Adjustment – Page 72.
September 2011 1
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